powees



(No Model.)

J. W. POWERS.

PUMP.

No. 287,058. Patented 001;. 28,1888.

Ny FUERS. Pmwmnogmmr. wammgmn. mc

' in the same position.

` UNiTnD vSTATES PATENT OFFICE'.

JAY WQ POVVERS, OF WINNETKA, ILLINOIS, ASSIGNOR OF ONE-HALF TO Monrns J. MoTH,

PUMP.

or sAME PLACE.

SPECIFICATION forming part 0f Letters Patent N0. 287,053, dated October 23,1883. Application filed December 22, ieee. (No model.)

fo all whom it may concern:

Be it known that I, JAY W. POWERS, a citizen of the United States of America, residing at VVinnetka, in the county ofCook and State of Illinois, have invented certain new and useful Improvements in Pumps, of which the following is a specification.

This invention relates to pumps, either oil, water, or air; and it consists of a cylinder provided with a piston-head and a piston-rod hollowr rod at the lowest point of their stroke.V

Fig. 2 is a similar view, showing the rod at the center of its upward stroke, but the head Fi'g. 3 shows both-rod and head at the upper point of their stroke, and Fig. 4 shows the rod at the middle of its downward stroke, but the piston still at rest.

A represents a cylinder, of suitable size, tted with a head, A, in one end, having a stuft'- ing-boX, 2t, and havingits opposite end pro- Ivided with a head or spider-ring, A2, which may be either solid or open, as it merely serves as a guide for the piston-head.

B is the piston-head, which may be of any suitable form, but which I prefer to construct, as shown, of two circular plates, b b, provided on their opposing faces with annularl V-shaped rings b', through which are passed a series of screws, b2, to secure the plates firmly together and admit of their being adjusted to or from each other. The space between the plates b b is filled with a suitable packing substance, b3,

andit is evident that as the two plates are drawn together by the screws the packing will be distended and the piston-head well packed.

The-upper plate, b, is provided with a sleeve,

C, formed with a slot, c, on each side, and the piston-rod D passes through this sleeve, the

head B, and stuingbox a at one end, and

through thehead or ring A2 at the other, and is adapted to slide freely through them all, thus giving it a short stroke independent of the movement of the piston-head, this stroke being the length of the slots c c in the sleeve C, the piston being provided with pins or projections d d, working in these slots, as will be seen by reference to the drawings. The pisy t0n-rod D is -bored out from each end toward its center, to form passages d', which do not meet, but communicate with the outer side of the rod by ports d2. The distance between the inner ends of these passages is left solid, and corresponds to the length of the slots c c.

The operation of the pump is as follows: The piston head and rod being in their lowest position, as seen in Fig. l, the upper passage,

d', is .in communication with the pump-cylinder, and the lower one or suction passage is closed by the stuffing-box a. The rod now rises the length of the slots cc without moving the piston, and the upper passage, d', is closed bythe head B, while the lower one registers with the cylinder, as seen in Fig. 2. As the rod continues to rise the pins d lift the pistonhead, and the liquid or air is drawn into the cylinder through the lower passage in the rod, as seen by Fig. 3. The piston-rod now having reached the upper end of its stroke, the motion is reversed, the rod falls through the head un til the lower passage, d', is closed andthe upper 011e registers with thecylinder, as seen by Fig. 4, and as the head is forced down the water, air, or oil isforced out through the exit- IOO also that by a duplication of the parts described a double-acting pump may be made that will admit and expel the air from both sides of the piston as well as the one just described.

Having tlius fully described iny invention, what I claim as new, and desire to secure by Letters Patent, is

1. In apump, the combination, with apumpcylinder and its piston-head, of a piston-rod formed with inlet and outlet passages communicating with its opposite ends and adapted to be shifted a short distance in either direction without moving the piston-head, substantially as shown and described. Y

2. In a pump, a piston-head having a suitable packed opening through its center for the passage of the piston-rod, in combination with a piston-rod provided with inlet and outlet passages leading to its opposite ends, and adapted to be moved in either direction a suicient distance to close one and open the other of these passages independent of the motion of the piston-head, substantially as described and shown.

3. In a pump, a piston-head formed of two plates having annular V-shaped rings upon their contiguous faces, said plates being secured together by screws and packed with any suitable material, and an opening through the center for the passage of the piston-rod, whereby when the two platesare drawn together by the screws the packing is distended and tightly packs both the piston-rod and piston-head, substantially as shown and described.

4. In a pump, the combination of the piston-head B, composed of the plates b b, secured together by screws b2, and provided with the sleeve C, having slots c, ofV the piston-rod D, provided with passages d d', leading from near its center to either end, and pins d d, working in the slots in the sleeve, whereby the rod has a slight motion independent of the head to cover and uncover the cored passages, substantially as described and shown.

5. In a pump, the cylinder A, having head A and stuffing-box a, in combination with the piston-head B, having sleeve C, provided with slots c c, and piston-rod D, having inlet and outlet passages d d, communicating with its opposite ends, and pins or projections d d, working in the slotted sleeve, all constructed and arranged to operate substantially as and for the purpose set forth and described.

In testimony whereof I afiix my signature in presence of two witnesses.

JAY W, roWERs. 

